Add time:07/31/2019         Source:sciencedirect.com

Niobium sulphidation kinetics, as well as chemical diffusion and nonstoichiometry in niobium sulphide, Nb1+xS2, have been studied as a function of temperature (973–1273 K) and sulphur vapour pressure (10−4–5 Pa) using microthermogravimetric techniques. It has been shown that the excellent resistance of niobium to highly sulphidizing atmospheres results from very low mobility of point defects in Nb1+xS2 sulphide, which constitutes the main part of the scale on this metal.

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